The CUDA gravity simulator has reached the point where it has a simulation engine that can display a 1024-body simulation in real-time. (Check it out from the beginning.) In getting to that point, we hit the limit on the number of threads that can be started in a single thread block in CUDA, but of course, that is not the end of the story. We can still increase the number of bodies in the simulation further, and after we've explored how to do that, we'll experiment with the parameters of the simulation to see if we can get anything interesting going that looks like a star cluster. Spoiler alert: we can, and we will.
